Re: [Xen-users] substantial shutdown delay for PV guests with PCI -passthrough

[Atom2 <ariel.atom2@web2web.at>]

This is just a (very) gentle ping ... or have I missed out on a reply?

Thanks Atom2

Am 02.04.14 17:17, schrieb Atom2:
>
> Am 02.04.14 16:44, schrieb Ian Jackson:
>> Atom2 writes ("Re: [Xen-devel] [Xen-users] substantial shutdown delay
>> for PV guests with PCI -passthrough"):
>>> Am 21.03.14 19:11, schrieb Ian Jackson:
>>>> Can you run it again with this, on top of the previous patch, please ?
>>>
>>> Sure, the new output of xl -vvv create -F domain is again attached to
>>> this e-Mail.
>>
>> Sorry for the delay replying.  I have been ill :-(.
> Sorry to hear that. Though I noticed your absence from the list I simply
> assumed that you were off on vacation. In any case good to see you back.
>>
>>> <NOTE: at this point a 10s pause happens>
>>> libxl: error: libxl_device.c:1134:libxl__wait_for_backend_deprecated:
>>> Backend /local/domain/0/backend/pci/4/0 not ready (state 7)
>>> libxl: error: libxl_device.c:1138:libxl__wait_for_backend_deprecated:
>>> FE /local/domain/4/device/pci/0 state 6
>>> libxl: debug: libxl_pci.c:204:libxl__device_pci_remove_xenstore: pci
>>> backend at /local/domain/0/backend/pci/4/0 is not ready
>>> libxl: error: libxl_pci.c:1250:do_pci_remove:
>>> xc_domain_irq_permission irq=16
>>
>> So the backend here is in state 7 (Reconfiguring), but the frontend is
>> in state 6 (Closed).  I think this is a bug in pciback.
>>
>> I looked at drivers/xen/xen-pciback/xenbus.c in Linux 3.13 and found
>> xen_pcibk_frontend_changed which seems to do roughly what I would
>> expect.
>>
>> Has this changed at some point ?
>>
>> Atom, what kernel are you using ?
> All the error messages stem from kernel 3.11.7. In the meantime 3.13.2
> became stable for gentoo and I installed that a few days ago. I have not
> run the debug output yet or timed the shutdown process, but there's
> still a delay with that kernel and it feels as long as before. I you
> want, I can clearly provide new debug output or timing information.
>
> Thanks Atom2
>>
>> Thanks,
>> Ian.
>>
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